Bug 2536349 (CVE-2026-90383) - CVE-2026-90383 kernel: misc: sgi-gru: remove interrupt-context page-table walks
Summary: CVE-2026-90383 kernel: misc: sgi-gru: remove interrupt-context page-table walks
Keywords:
Status: NEW
Alias: CVE-2026-90383
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 17:31 UTC by OSIDB Bzimport
Modified: 2026-10-21 05:10 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-09-17 17:31:11 UTC
In the Linux kernel, the following vulnerability has been resolved:

misc: sgi-gru: remove interrupt-context page-table walks

The GRU TLB miss handler walks a process's page tables without holding
page-table locks or a reference to the mapped page. It also uses a kernel
page-table accessor on user page tables and supports only PMD-level large
mappings on x86-64.

Remove the direct walker. Send interrupt faults directly to user polling
mode so the existing call-OS fallback retries them in process context.

Remove the mmap-lock failure statistic that can no longer be incremented.


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